<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Felx画骰子</title>
</head>
<style>
    .box{
        display: flex;
        justify-content: space-between;
        width: 200px;
        height: 200px;
        border: 2px solid #ccc;
        padding: 20px;
    }
    .item{
        display: block;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: #666;
    }
    .item:nth-child(2){
        align-self: center;
    }
    .item:nth-child(3){
        align-self: flex-end;
    }
</style>
<body>
    <div class="box">
        <span class="item"></span>
        <span class="item"></span>
        <span class="item"></span>
    </div>
</body>
</html>